[BUGFIX] Force correct type in ActionViewHelpers

Add several type casts to avoid notices.

Resolves: #100338
Releases: main, 12.4, 11.5
Change-Id: Id9185a0f8f331616776b9818d2a2dcc77dfceda8
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/79214


Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Stefan Bürk <stefan@buerk.tech>